We consider the Gross-Pitaevskii equation on R^4 and the cubic-quintic nonlinear Schrodinger equation (NLS) on R^3 with non-vanishing boundary conditions at spatial infinity. By viewing these equations as perturbations to the energy-critical NLS, we prove that they are globally well-posed in their energy spaces. In particular, we prove unconditional uniqueness in the energy spaces for these equations.
- Gross–Pitaevskii equation
- non-vanishing boundary condition